Antislap spring for piston rings



H. c. PHELPS AND J. 0. FOX. ANTISLAP SPRING FQR PISTON RINGS.

APPLICATION FILED JUNE 20. I920- 1,422,780. Patented July M, 119225INVENTORS 4! flffigzw' Cam HENRY G. PHELI PS AND JOHN C. FOX, OFGLENDALE, CALIFORNIA.

.AN'IISLAP SPRING- IEOR EISTON RINGS.

Application filed June 20, 1921.

To aZZ whom it may concern:

Be it known that we, HENRY C. PHELPS and JOHN C. Fox, citizens of theUnited States, residing at Glendale, in the county of Los Angeles andState of California, have by yieldablyurgmg the same into engagementwith the cylinder wall.

The improved spring structure is mounted in the piston ring groove ofthe piston so as to bear, against the inner surface'o-f the piston ring,and the spring structure is so arranged as to provide the desiredresiliency, while at the same time affording a yieldably strongconstruction which is not liable to be broken.

The spring structure includes a single strip of suitable resilientmaterial which is cut so as to form lips which may be bent upin order toform a yielding device. The cuts in the spring strip are so arranged asto form a maximum number of yieldable lips, while at the same timearranging the same so as tonot unnecessarily weaken the spring stri Tlieinvention will be readily understood from the following description ofthe accompanying drawings, in which:

igure 1 is a side elevation of a piston mounted in a cylinder which isshown in axial section, and having the piston partly broken away to showthe piston ring thereof a and the improved antislapping spring means forthe piston ring arranged in its groove.

Fig. 2 is a detail section on the line 22 .Of Fig. 1.

Fig. 3 is a perspective view of a portion of the antislapp-ing spring.

In the drawings we have illustrated the invention as employed inconnection with a piston 1 mounted in a cylinder 2' and having a pistonring groove 3 in which is received a usual piston ring 4.

A strip 5 of suitable resilient metal is received in groove 3 and backof piston ring 4, and spring lips are bent up from this strip so as toform a yieldable implngement against the piston ring.

The spring lips are preferably so formed Specification of LettersPatent.

Patented July 11, 1922.

Serial No. 478,970.

mum width of the spring strip at all points in order to not weaken thelatter to an appreciable degree. For this purpose the spring strip iscut at its opposite side edges so as to form the spring lips at theopposite edges of the strip. These lips extend only part way across thestrip, and the lips at opposite side edges are arranged in staggeredrelation along the length of the spring strip. The staggered lips arealso longitudinally spaced one beyond another an appreciable distance,and as a consequence it will be noted that uncut portions of the springstrip are arranged at the sides of the lips and also between adjacentlips at the respective sides of the strip.

The lips are preferably formed by transversely slitting the spring stripas shown at 6. These slots alternately extend inwardly from therespective sides of the spring strip and are longitudinally spaced onebeyond another. From the inner ends of slots 6, longitudinal slots 7extend in opposite directions so as to form lips 8. The slots 7 atopposite sides of the spring strip and which are adjacent to oneanother, are so arranged as to terminate short of one another in orderto form an appreciable space 9 of the spring strip between the lips.

The spring lips as thus formed are bent outwardly, as clearly shown inFig. 3, and the spring strip is then mounted in the groove 3 back of apiston ring so that the spring lips will form a resilient support forthe piston ring tending to yieldably urge the latter outwardly againstthe cylinder wall. As a result slapping of the piston is prevented.

Various changes may be made without departing from the spirit of theinvention as claimed.

1 What is claimed is:

1. A piston ring expander comprising a strip of resilient materialalternately transversely slitted from its side edges and longitudinallyslotted both ways from the transverse slits, and'the ends of the lipsthus formed being turned outwardly, the uncut ends of one set of lipsbeing nearly in transverse alinement with the uncut ends of the adjacentlips .at the opposite side.

2. The combination with a piston having a groove and a piston ring inthe groove, of

a piston ring-expander comprising a strip with the uncut ends bf theadjaeent lips at of resilient matenal alternately transversely theopposite side.

slitted from its side edges and longitudinally In testimenx whereof Wehave signed our 10,

slotted both Ways from the transverse slits, names to thisspecification.

5 and the ends of the lips thusformed being turned utwardl the uncutends of one set I HENRY. C. PHELPS.

i of lips being nearly in transverse alinement; 7 JOHN C. FOX.

